Help Parse error

[android bugger]

Ok, so i was playing mcpe and had an idea. I unpacked the copy of the apk and then modified the codes and many things hoping i could modify the game thingys and the gameplay wo/o 3rd party software..
THE whole proccess...
Unzipped with es file manager,
Modified files:
Splashes.json
Items.json
Etc. But anything from important files!
Zipped with es
Signed with zipsigner
Renamed .zip to .apk